Order of Operations Puzzle

Insert addition, subtraction, multiplication, or division symbols into the blanks. You may also use parentheses. You may use any operation or symbol more than once.
1) 1 _ 1 _ 1 _ 1 = 1
2) 2 _ 2 _ 2 _ 2 = 2
3) 3 _ 3 _ 3 _ 3 = 3
4) 4 _ 4 _ 4 _ 4 = 4
5) 5 _ 5 _ 5 _ 5 = 4
6) 6 _ 6 _ 6 _ 6 = 4
7) 7 _ 7 _ 7 _ 7 = 3
8) 8 _ 8 _ 8 _ 8 = 2
9) 9 _ 9 _ 9 _ 9 = 1

Acknowledgment: These exercises are from Casio Education's website.